过去进行时：

1．构成：were / was + 现在分词

2．功能：

（1）表示过去某一时刻或阶段正在发生的动作。
►. I was playing chess at 8 yesterday evening.
►. When I arrived, they were watching TV.
►. They were doing housework this time last week.

（2）用于条件状语从句中表示过去将来进行的动作。
►. She told me to wake him up if she was sleeping.
►. I asked my friend to warn me about it as long as I was driving too fast.

测试精编

1. My brother ________ while he ________ his bicycle and hurt himself.
A. fell / was riding                   B. feel / were riding
C. had fallen / rode                 D. had fallen / was riding

2. He ________ his leg as he ________ in a football match.
A. broke / played                    B. was breaking / was playing
C. broke / was playing             D. was breaking / played

3. -My father will be here tomorrow. I thought that he ________ today.
A. was corning                     B. is coming
C. will come                          D. comes

4. Jack was going out of the shop when he collided with an old woman who ________ in.
A. come        B. was coming       C. had been coming        D. had come

5. Michike couldn't come to the telephone when Mr. Smith called her because she ________ in the lab.
A. had been working                 B. has been working
C. was working                        D. worked

KEYS

1. A     2. C    3. A    4. B    5. C